Adjusting means for boring-bar cutters



APPLICATION FILED FEB. 20, 19W.

Patented m s, 1920.

WITNESSES:

\s ATTORNEY ADJUSTING MEANS FOR BORING-BAR CUTTERS.

To all whom it may concern: 7 a

Be it known that 1, WILLIAM E. KELLY, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and-State of Ohio, have invented a new and useful Adjusting Means for Boring-Bar lutters, of which the followingis a specification.

My invention relates to adjusting means can besaved and-whereby an apparatus may be adjusted, centralized or otherwise, in or with another apparatus which is out of alinement with other mechanisms with which it must cooperate.

I attain this ob ect by the mechanism illustrated in the accompanying drawing which shows the present invention embodied in a fiat cutter mounted in a boring bar and in which Figure I is a general side view of a boring bar partly broken away to show interior parts; Fig. II is a plan View of Fig. I

partly broken away to line 1-1 to show interior parts; Fig. III is a section on line 3-3 of Fig. I; Fig. IV Fig. I showing a modification of the adjusting mechanism; Fig. to Fig. I showing another modification of the adjusting mechanism, and Fig. VI is a section on line 6-6 of Fig. V

Similar'reference characters refer to similar parts throughout the severalviews.

' Referring now particularly to Figs. I, II, and III, the boring bar selected to illustrate the present invention has the bar 2 which has the slot 4 into which the cutter 5. fits slidingly. The front end of the cutter is supported in the bar 2 by the pin 24 which may be of any suitable design while the rear end of the cutter has the notch 7 for the purpose of engaging the adjusting plug 8.-

The pin 24, preferably, fits snugly into the openings provided therefor in the bar 2, but.

the opening in the cutter 5 through which the pin 24 passes should be a little larger than the diameter of the pin so that the cutter 5 may move endwise. A convenient'manner of providing for such endwise motion is to provide is a View similar to' V is a view similar Specification of Letters Patent. Pate t d J 8 1920 Application filed February 20, 1917. Serial liTo. 149,781.

to provide the oblong opening 27 in the cutter 5 as shown; Substantially parallel with and back of the slot 4, the bar 2 has two threaded openings into which the screws 9 and 10 fit. Intermediate these threaded opens into the slot 4.

The front end of the adjustingplug 8 fits snugly into the notch 7 while the rear end thereof fits loosely into the recess 11; the spaces 12 determine the amount of adjustment which can be given the cutter 5. In this instance, the front end ofthe adjusting plug 8 does not abut on the face 13 of the notch 7 as shown but the cutter 5'abuts on the face 14 of the slot 4.

This slot 4,is sufficiently long to permit the suitable means is brought in contact 'with' one cutting face of the cutter and thereading of the indicator is noted; the bar is then rotated half way around so that-the other cutting face of the cutter contacts the indicator as before and this reading is also noted. If both readings are alike thecutting faces of the cutter are the same distance from the center of the bar and the cutter is set centrally in the bar. If, however, the indicator shows a different reading on each cutting face, as for instance when the cutting face which was tested first is farther own. 1

WILLIAM E. KELLY, 0F CLEVELAND, OHIO.

. '60 openings, the bar 2 has the recess 11 which. i

from the center of the bar than the one tested last, the screw adjacent the cutting face which was tested last should be turned out and the opposite one turned in whereby the adjusting plug and consequently the cutter will be moved toward "the shorter or lastly tested side or cutting face. The screws 9 and 10 are manipulated in the above'manner until the cutter is in proper positionat which time thescrews 9 and 10 are tightened down firmly upon the adjusting plug whereby the same is securely locked in position since the adjusting screws act as checks and locks because they are both screwed against the same'abutment and substantially against each other. In a similar manner the cutter may be adjusted in relation with a hole to be bored for instance when say the boring bar is out of alinement with the hole to be bored. In this instance, the cutting faces of the cutter may be brought in contact with the wall of the hole, or an indicator may be mounted on the article into which the hole is to be bored, or on some other part of an apparatus and the cutter set thereby similarly as previously described.

If it is desired that a cutter or other mechanism be set off center, the above procedure may be employed; the screws 9 and 10 being then manipulated as previously described until the cutter or other mechanism is set as desired.

The method of operation given here should enable others skilled in the art to adjust other scribed. i V

In some cases of application of .this inve11- tion it may be desirable to provide a more positive means for holding the adjusting plug in place which is accomplished for instance as'shown in Figs. IV and V and VI.

Referring now particularly to Fig. IV it is seen that the pilot 15 is formed on the screw 16 and that the screw 17 has an opening to receive the pilot 15. In this instance, the adjusting plug 18 has an open-,

ing for the pilot 15 to pass through whereby the adjusting plug 18 may swivel on the pilot 15 and at the same time is prevented 1 from displacement in the recess, particularly when the slot shown in Fig. VI hereinafter described is employed. The pilot l5 is, in

this instance, substantially supported which helps to aline both screws which feature is advantageous since screws 7 which are inserted in the manner shown here usually do not line up correctly. 7

For the purpose of economy in manufacture, it is desirable that both screws be alike which is not the case in the modification shown in Fig. IV but is accomplished in the modification shown in Fig. V.

Referring now particularly to Fig. V

. it is seen that the screw 19 has the pilot 20 while the screw 21 has the pilot 22. I11

this instance, the screws 19 and 21 are alike,

the pilots 20 and 22 are short, and neither of .the screws needs to be bored to receive a pilot as in Fig. IV. Theadjusting plug 23 has an opening for the pilots 20 and 22 upon which thesame can swivel and which 7 holds the same in position.

In some cases it may be difiicult to provide the recessll previously shown and described. A modification to overcome this 7 difficulty is shown in Fig. VI in which the slot 25, wherein the adjusting plug 23 is inserted, extends through the bar 3 adja cent to the slot 4;. r

In any, or all ofthe modifications shown mechanisms than those de-,

1. An apparatus of the character 'described comprising a body, an adjustable member mounted in said body, a locating member mounted in said body and adapted to engage said adjustable member, a screw acting against each side of said locating member to adjust and lock the same in desired position transversely of said body and adapted to hold the same in position longitudinally of said body.

2. An apparatus of the character de-.

scribedcomprising a bar, a cutter mounted in said bar and adapted to slide transversely therein, a locating member mounted in said bar and adapted to en age said vcutter ,a

screw acting against eac 7 side of said locating member to adjust and lock the same in desired position transversely of said bar and adapted/to hold the same in position longitudinally ofsaid bar. I

3. An apparatus of the character described comprising a bar provided with a transverse slot, a cutter adaptedto slide in said slotand resting againstthe rear wall thereof, an adjusting plug in said bar and adapted to engage said cutter, and two screws in'said bar and actingagainst opposite sides of said adjusting'plug to adjust said cutter in relation with the axisof said bar and lock said adjusting plug in adjusted position. I 1

4. An apparatus of the character described comprising a barprovided with a transverse slot, a cutter said slot and adapted to rest against and slide, bodily along the rear wall thereof, an adjusting plug in said bar and adapted toengage said cutter, two screws mounted in said .bar and acting against opposite sides of said adjusting plug to adjust said cutter in relation with the axis of said bar and to lock said adjusting plug in adjusted position, and means provided on said screws to hold said adjusting plug in positionlongitudinally of said bar.

5. An. apparatus of the character de- I scribed comprising a bar' providedwith a slot, a cutter adapted to slide bodily in said slot, an adjusting plug in said bar and adapted to engage the rear end of said cutter, means mounted in said barto support the front end of said cutter, two screws in said bar and adapted to act against said adjusting plug to adjust said cutter in relation with the axis of said bar and to lock said adjusting plug in adjusted position.

6. An apparatus of the character described comprising a bar provided with a transverse slot and a recess adjacent thereto, a cutter in said slot and provided with a notch at its rearend, an adjusting plug in said recess and engaging said notch in said cutter, a pin in said bar and adapted to support the front end of said cutter, and a screw on each side of said adjusting plug and adapted to move the same laterally in said slot and to lock the same in adjusted position.

WILLIAM E. KELLY. 

